Air-valve for pneumatic control systems.



APXLGATION PLBD AUG. 24, 1907.

. Wam @if l if:

LAWRENCE S. NASH, OF 'DETRGE MCHIGAN', ASSIGNOB TG CHARLES BRUSHABER,

0F DETRJIT, MICHIGAN.

AKR-VALVE FR PNEUMATIC CNTROL SYSTEMS.

states,

To all whom 'it may comer/n:

Be it known that l, Lawrence S, Nesta a citizen of the United States ot merica7 residing at Detroitlq in the county ot YWayne and State of Michigan, have invented certain new and useful improvements in iirm Valves for Pneumatic Control Systems of which the following is a specitication, reiterence being had?. therein to tlie accompanying drawings.

This invention relates to a inultiport valve for controlling a pneumatic system, and especially to certain features whereby tlie valve closureuis balanced and wllereloy leal(u age is reduced to a minimum.

The invention consists in tlie matters here-- inatter set fortliL5 anti more particularly pointed out in tli'e appentlefl claim Referring to the cirawings7 igure l is a plan view ot' a valve eralieeying the features of the inventionc 2 is a View' in longitudinal section on line .ft or Fig. ig: 3 is a diagrammatic, forces-sectional vienT through the casing anti closnre, showing the' valve in a closerl nent position., -igE is a diagrannnatie7 cross-sectional view show ing one of the outlet ports open, the others relievea.

llie valvei as herein slmwn5 is especially adapted forl a pneumatic control Qystem :for automobiles or the like wherein the cluteli and the brake are thrown in enel ont by under pressuree f ln the drawings, l represents circuler casing of a valve7 having a frnstoconical7 centrally apertnrerl valve-seat and a number ot discharge elects 2 radially leading from the periphery tliereo tieren li symmetric-A- ally disposed nipples 3 torinerl integrally on the casingand interiorly screw-threaded or otherwise tted for pipe connections Where,

by eacli may oe couple respectively with pneumatic ineens for operati-ng tile clot-cli, the service loi-aire anti the emergency iiralre of an autornoloileo A angecl base closes the lower endl of tire casing' wliieli is counterloored and? screw-'threaded to receive it7 anti an air inlet or supply duct 5 spending axial boss f3 communicates with time casing interiore The valve-sent is oounterloorerl to afford clearance and a relief space a conoitlal valve-closure l close. at its tippen smaller enol9 which is. lielcl in yielding engagement with the seat by a spring; e eompression Specification of Letters Patent.

Application lez iugust 2e, $07.

vwith bending capecrews i? i patented Apri, 5g liteit@ Serial No. 389,995.

between the closure and base, and is rotated by an axial stem 9 suitably secured thereto, extending through aehainberecl liulo i0 on the casing. A suitable cap il screw-threaded onto the hub, forms therewith a stntling box or packing glantt Dianietrically opposite outlet ports l are so disposed in the closure that they may eaoli be brought int-o register with any one of tire discharge riucts 2., ifiainetrically opposite ee exhaust ports 13 are iorinerl in the casing in the horizontal plane of the outlet ports l2, and loe connected to the outlet ports ley peripheral channels la in tlie closure tace.i loetween and i the plane ot tlie portsn The valve-closure is balanceti titer-erigir medium et a reli port le in its upper w ri7 so that air entering me casing tiirougii trie inlet or snpply duct 5 exerts tire saine pres-v sure on tiotli sides of tlie closures their eteotf ive areas oeing substantially equal. Eins allows tree actiona as tire closure spring alone liolcls the 'closure seat,

rlhe casing may have ary uor braclrets desiredn sliown is tlesigne; tor use i pneumatic control system, apspli securing ttie Casin to a s'e A suitable'latcliecl handle i9 o with qnarlrant 20 on the suppe. used to airi in bringing the several port-s register as clesireii, the seing ot un; length to lering the lianclles near to the station ot the operator.

lnoperation, the position in Fig. el, snows lootli outlet ports closecl anti all ltheir elects in communication with 'tre relietl porte7 so that any pressure in the connections or, elianr tiers is relieved and tlie allowed to escape when the outlet ports are closed. 1ilillien any' one of the outlet ports is operiert tlie pneumatic means piped thereto is actuated to op# erate its respective neeelianisrrh The conoidal torni et the seat makes closure self-centering and causes it to evenly and to t tightly'a time avoiding' leak age, I

@bviously9 the number anti disposition et the various ducts ports and channels,

CIR

' Well as other details ot construction7 may loe variecl Without departingfroin the spirit ot the invention, anti 'i do not care to limitnyself to any particular torni or arrangement of parte upwardly against the seat by a spring in Wliai, l: claim as my invention is:

A multi-port air valve comprising a eonoidal easing, having a centrally recessed rustoseonieal valve seal;a a base screwhreaded into the easing a eonoidal closure presenting substantially equal pressure areas to the recess and the easing interior held Compression beween die casing base and closure, an axial stein in the closure eX- ending through 'the recess, a packing gland on the casing, radial nipples integral with the casing 'ted for pipe connections, radial millet duels from the valve-seat extending axially through die nipples, exhaust pors in lie easing from ilse seat between fl-lie nlpi ples, an axial depending boss en the base, an inlet through the said boss opposite the closure, ports through the closure periphery adapted io register with the duets, Channels in the valve seat face extending around the periphery between the duets adapted to connect' the exhaust ports and duets when the later are nelJ in regisier with the closure porrs7 and a split clamp on the side of the easing for supporting it.

ln tesiniony whereof l affix my signaure in presence of Wo Witnesses.

LAWRENCE S. NASE-l, l/Vitnesses:

C. Stemming el lli/., Dons. 

